Home / 7,129.72-10,694.60-2,199.20

Finding the Fourth Proportional to 7,129.72, 10,694.60 and 2,199.20

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Solution

The fourth proportional to 7,129.72, 10,694.60 and 2,199.20 is: 3,298.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,129.72 : 10,694.60 = 2,199.20 : x
  2. Step 2: Convert to fraction form
    7,129.72/10,694.60 = 2,199.20/x
  3. Step 3: Cross multiply
    7,129.72x = 10,694.60 × 2,199.20
  4. Step 4: Simplify right side
    7,129.72x = 23,519,564.32
  5. Step 5: Solve for x
    x = 23,519,564.32/7,129.72
  6. Step 6: Final answer
    x = 3,298.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.